CBQE-0: add cb_2.0.2_upgrade.iss

Change-Id: Ie4932023790fc830a8174e847255d825e5f90791
Reviewed-on: http://review.couchbase.org/26827
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>